Improvement in hot-air chambers



JANE a. SWISS-HELM.

HOT AIR CHAMBER.

Patented June 13 N. PETERS, PHOTOLXTHOGRAPHER, WSHINGTON. D C.

NITED STATES PATENT QFFICE.

JANE GREY SWISSHELM, 0E PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN HOT-AIR CHAMBERS.

Specification forming part of Letters Patent N0. 178,813, dated June 13, 1876; application filed February 23, 1876. v

To all whom it may concern Be it known that I, Mrs. JANE GREY Swiss- HELM, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Ventilating-Flues and Hot-AirOhambers, of which the following is a specification:

My improvement consists in interposing between a cold-air chamber or flue and the hotair chamber partitions of thin plates of wrought metal, perforated by a sharp instrument, so as to have a burr or sharp rough edge around each perforation on one ,side, while on the other each one is a smooth-sided funnel-shaped flue, Figures 1 and 2. From this on the convex side, as the convexity aids theburrs in breaking and throwing off the airwaves when forced against them, Figs;l and 2. It may be still further strengthened by placing the plates in the form of cones in the circular pipes used to conduct the hot air into rooms, Fig. 3, D, or a similar pipe, if used as a supply-flue for cold air, Fig. 3, G. For a square or oblong pipe or line, if used as a supply-pipe, the plates should be flat and placed on the outside, with the burrs inward, Fig. 4, F, while, for a similar flue to carry air into a room on a side Wall, the burrs or plate should be reversed, Fig. 4, E.

Fig. 1 is a heating-furnace of any kind; A,

the furnace or fire-chamber; a, the smoke-flue B, the hot-air chamber G, the cold-air chamher; 0, the cold-air flue; D, hot-air flue l and 2, the perforated partitions; H, water-pan and supply-pocket.

Fig. 2 is a View of the same heating-furnace, looking downward, with the top removed.

Fig. 3 is two sections of circular pipe, with perforated cones-c to carry the air downward, D to carry it upward.

,Fig. 4 is two sections of oblong pipe or flue- F to pass air into the flue, E to pass air out of the flue.- The arrows show the direction in which the air passes.

These perforated plates are applicable to all heating apparatus, furnaces, and stoves, to all ventilating-dues, and to smoke-Hues, if so placed that they can be easily reached to remove the soot, which might easily clog such small openings. They apply, in short, to any opening or flue through which it is desired to have air pass freely in one direction, while it shall be hindered from passing in the opposite direction.

Having thus described myinvention, what I claim, and desire to secureby Letters Patent,

The combination, with a heating apparatus, of a foraminous plate perforated in the manner described-that is to say, with the larger end of the perforations toward the side from which the air is to be received, and the smaller pointed or burred end toward the hot-air chamher in which the air is to be warmed, or to: ward the apartment into which it is to be discharged after having been warmed.

MRS. JANE GREY SWISSHELM.

Attest: Y

J. G. MILLIGAN, W. B. NEGLY. 

